Jointing of flexible pipes



May 17, 1949. J. L. sAYERs JOINTING OF FLEXIBLE PIPES Filed June 12, 1945 ZYSheets-Sheet 2 Nus HmR/vey Patented May 17, 1949 .T OFTFLEXIBEE John Lawrence Sayers, Watford', England,.. asf

signor to ArnoldGreening, Sparrows Herne',

Bisliey England Applicationrlunem', 1945, SeizialNo'.` 5983956/ In Great Britain July 13; 1-344- 7' Claims;

Thisn invention. relates to. the. jointing. oi Hexible pipes-.such as lead. pipes.I

The. ends. of. lead. pipesare. usuallyi connected.

togethenby aleadjointwhich .usuallyrtakes about A, method. of connecting .together the. adjacent endsv of. two yiiexihleJ pipesoonsists in cutting.` the.

endsfofthepipes substantially atrightangles. tol

thelongitudinal.axisot the pipes fittingAl a. ierrule substantially equifdistant into theadjacent ends of.. the.. twopipes. ttingaA longitudinally split sleeve having tapered` endsover. thepipef ends so.

as tor ext-end.. over ,the.=joint' between the two pipe: end-s,-` drawing; sockets; having; conicall bores,. to:- wards-= one.` another from' opposite: endsv ot the. sleeve; andi.'l lo'fzk'ingiy the two sockets; together.' in: their drawn-up position.

Inl` orderthat` the internaladiametenof the pipes may; not be: reduced by" the? ferrule;` their boresaref preferably enlarged: at? the; end; for a'. length and depth-corresponding with". at least half: the

length; of: the terrine;A andl the thickness1 of thei ferrnle..

rIthe fzerrule isfpreferably coatedr ex-ternallt74 withl enamel on other suitahleinat'erial: to :ensure atwater-tight :jointy being: formed.

For loeling'thesocketstogether their adjacentV4 faees'f arel providd with' male 'l and female parts" which on their inter-engaging peripheral sure faces-iarteiformedwith registeringannular' grooves,

theiemzrle---memberhei-iigA provided* withi one* or moref-holesfwhioh extendifrom the outside thereof to theregistering' grooves; theho1eeorhols being' tangential? to the',l grooves; a wird pin` orl thelike being-passed@ intb-the-holeor `holes and engaging with. tiiefY grooves:

Ih'e' sockets areI4 preferably4 di'awn together by" anx` appliance#Y by means: of which" considerable leverageLoan he applieditothesocketsior moving them towards onerv another' along the split" sleeve;

example with. reference to the accompanying; drawings, wherein.:-

Fig.V 1 showsLa` sectional; View of.a joint".

Fig. 2"i's a cross section on thalineIi'J--Ill` of`A Fig. 1.

Eig.` 3. is. a partialrlcross; section ofi a. modified. arrangement on the. line II'-II. of'Fi'g. 1I

Fig.. 41 shows in elevationV a modiedlform of' joint before the fl'nalclosure.

Fig. 5 shows int. elevation a tool. for enlarging` theA end ofthe bore in a' pipe..

Figs. 6 and 'Z'showviewszat right.k anglesto` one another of' a tool' usedin jointing lead'tpipes.

Fig. 8 shows ase'ctional viewofa modification. of' the joint;

As shown..v in Figi two leaclQpipes` l 2j to be. jointed: together. at'. their adjacent ends. have; ends out asnear as possible at' right anglest'o. the longitudinal', axis. of thev pipes. The ends oir the. boresoi the' pipes I i are then.. enlarged. in diameter.A by a.tool,. shown inf Fig.` 5:, The :tooli is provided. With..a-.. handle,y a. stem. 4.. and. a boss, 5;. The boss 5 fits with a slightfolearance ini` the.- bore. of. the: pipes: I, .2n andserves-fto` guide. the'. tool Whilst the` boreV isf: being. enlargedby means= of; one. or more miizers.` Bfwhich are:- provided` onthe.- bossi at-.on near theendfthereoi'-adjacentto the. stemllk The length and depth of the enlargement-of@ the.I boref are preferablyr such:v asf to': receivel half the lengthl and the: full' thickness: ofi a. ferrulet: 'I1 so that'thef diameterfofY the throi-igh:'flowpassage` in: the :pipe assembly'remains fconstant For the purpose of connecting together the two pipes I,..2 the; ferrulef. 1i isa fitted'.intthe endll of one; pipezionexample th'ezpipe I @n the" end* ofi the pipe I is now pluggedfireely'a=socketf.8'pro' vided witina` ooni'cal bore, vsrl'iilsty al split' sleeve 93 tapering ontheioutsidetowardsrhotn ends, is-

iitted for-halt itslength on the outside of the'` pipe'li.

A- sockfet I Iris" pl'ac'ed freely' on theA endi off the" pipe= 2f.

Thesockets' 8, Hliare eachproviddwith ai. shoulder II, I2c preferablyv inclined towards; one: another as showni'n Fig; 1".

Theso'cket S'is providedwith an. annular ange I3; forminga female' parti fbrreceiving'th'e end ofthesocketlwhich formsthe male part'.

The end ofthe pipe' 2"is tt'edloven theirrule; l and into the split. sleeve..9, one half"of'the'ffer rule 1 "engageswith' each pipe.l I; v2"`.whilst one .halt orthasplitisleeveSiits'over eachpipe I ;.2`;

'Btioaiiiveritiont Willl noW'lzie'A described'g by way of? 55.- The sockets 8i", I0 are' now drawnl towards one.V

another, over the opposite ends of the split sleeve 9, as far as possible by hand.

The sockets 8, II) are now drawn into the position shown in Fig. 1 by means of the tool shown in Figs. 6 and 7, As shown in these figures the tool consists of two member I3, I4 each of which is preferably formed by two metal bars I5, I6 (Fig. 7) suitably secured together at one end, for example by rivets, and splayed apart at their other end by a channel bracket I1.

At the splayed end of each member I3, I4 are provided two projections I8, I9 adapted to engage with substantially diametrically opposite points of the shoulders I I, I2.

The spacing apart of the ends of the members, I3, I4 provided with the projections I8, I9 is adjusted by means of chains 20 connected at one end to the member I 3 and passing around rollers 2I at the ends of the member I4, the other ends of the chains 20 being connected to a rack 22 passing through a guide 23 secured to the other end of the member I4. With the rack co-operates a spring actuated pawl 24 for adjusting the length of the chains 20.

As will be appreciated the sockets 8, I Il are drawn together by pushing the free ends of the members I3, I4 towards one another. The members I3, I4 are made of the required length to provide the necessary leverage.

The iiange I3, of the socket 8, and the socket I il are provided in their adjacent surfaces and in registering positions, when the sockets are in the position shown in Fig. 1 with annular grooves 25, 25. The iange I3 is provided with one or more holes such as 21, which leads or lead tangentially into the registering grooves 25, 2B. Through the hole or holes 21 and the grooves 25, 26 are adapted to be passed one or more wires, 23 for securing the sockets 8, I in the engage position.

As shown in Fig. 3 the hole 21 may extend completely through the flange I3 so that a pin or the like may be passed therethrough for engagement with the grooves 25, 26;

In the modication shown in Fig. 4 the sockets I0 are provided with flanges 28, 2S which, after having been drawn together as above described, are adapted to be locked together by a band, such as 30, such as used for example :for securing lids to containers.

When enlarging the bores of the pipes lubricant is used freely but is removed before the ferrule 1 is inserted. A lm of oil is preferably provided between the split sleeve 9 and the sockets 8, I tl.

The ferrule 1 is preferably coated on the outside with enamel or other suitable material for ensuring a watertight joint.

In the modied form of construction shown in Fig. 8 a lead pipe 25 is connected to a T-piece 2t which may be in the form of a brass casting. The limb 21 of the T-piece is provided with a flange 23 which is provided with a shoulder 29 and with a rim 30. The ends 3I, 32 may be constructed in the same manner as the limb 21, for the connection of further pipes, or one or both of these ends 3 I, 32 may be screw threaded for receiving a tap.

The limb 21, or one or both the ends 3l, 32 when a pipe su-ch as 25 is to be secured thereto, is provided with a projecting ferrule 33 of which the bore is of the same internal diameter as the bore of the limb 21.

The bore of the pipe 25 is enlarged in the manner above described for tting over the ferrule 33.

Over the end of the pipe 25 is tted a split tapered sleeve 34, whilst over the sleeve 34 is iitted a socket 35. The socket is of the same construction as the socket Il) above described in connection with Figs. 1 to 3.

The socket 35 is drawn against the flange 28 in the same manner as above described in connection with the sockets 8, I0 above described.

The flange 28 and socket 35 are secured togcther in the same manner as above described in connection with the sockets 8, I0 shown in Figs. 1 to 3 or in the manner above described in ccnnection with Fig. 4.

Although the arrangement described in connection with Fig. 8 has been described more specifically in connection with a T-piece, it will be understood that the same arrangement may be adopted in connection with other fittings such as a rigid pipe or bend or whenever a ilexible pipe, such as a lead pipe is to be connected to a rigid pipe.

As will be appreciated from the foregoing lead pipes can be connected together by the method according to the present invention in a very short period of time thus having a considerable advantage over the usual lead joints, especially as regards economy in time and labour.

I claim:

l. A coupling for connecting together the ends of iiexible pipes, wherein a split sleeve is provided with external tapered ends, whilst a pair of sockets have tapered bores, these sockets being adapted to be drawn together over the tapered ends of the sleeve, and a circumferential outwardly projecting shoulder carried by each socket adjacent the inner ends of same, said shoulders being adapted to be engaged by a clamping tool.

2. A coupling for connecting together the ends of flexible pipes, wherein a split sleeve is provided with external tapered ends, whilst a pair of sockets have tapered bores, these sockets being adapted to be drawn together over the tapered ends of the sleeve, said sockets being provided on their adjacent faces with male and female portions which on their interengaging peripheral surfaces have registering annular grooves, the female member being provided with one or more holes which extend from the outside thereof to the registering grooves, the hole or holes being tangential to the grooves, a Wire pin or the like being passed into the hole or holes and engaging with the grooves.

3. A coupling for connecting together the ends of iiexible pipes, wherein a split sleeve is provided with external tapered ends, whilst a pair of sockets have tapered bores, these sockets being adapted to be drawn together over the tapered ends of the sleeve, a circumferential outwardly projecting shoulder carried by each socket adjacent the inner ends of same, said shoulders being adapted to be engaged by a clamping tool, and clip means engaging said shoulders for retaining the sockets against separating movement.

4. A pipe section-connecting joint comprising a pair of pipe sections providing substantially contiguous meeting ends, the meeting ends of said pipes being internally counter-bored, a ferrule snugly tting in the counter-bored ends of said pipe sections and approximating the internal diameter thereof, a split sleeve extending across the joint between said sections and snugly embracing the outer surfaces of the same, the exterior of said sleeve being tapered from adjacent its midportion to its outer ends and throughout its exterior circumference, a collar slidable from each pipe section onto the proximate tapered end of said split sleeve for binding the same to the subjacent pipe section, and each collar having a circumferential shoulder adjacent its inner end adapted to be engaged by pressure-applying means for actuating the collars toward one another, one of said collars having at its inner end an axially projecting flange adapted to contiguously overlie the adjacent portion of the shoulder of the other collar, said flange and second mentioned collar having opposed circumferentially extending grooves traversing at least a substantial portion of the circumference of said flange and shoulder and providing a locking means-receiving passage, and said flange having a tangentially extending hole aligned With said passage and communicating with the same, and a Wire insertable into said passage, whereby to prevent separation of said collars.

5. The combination set forth in claim 4, and the outer walls of said collar shoulders being undercut to provide retaining engagement for a collar-compressing means.

6. A pipe section-connecting joint comprising a pair of pipe sections providing substantially contiguous meeting ends, one of said pipe sections providing an exterior circumferential shoulder at its junction with the inner end of the other pipe section, said shoulder having a circumferential ange extension overlying and spaced from the exterior diameter of the other pipe section, a split sleeve exteriorly embracing the second mentioned pipe section inwardly of the inner end of same, said sleeve being tapered to reduced thickness in the direction of its rear end, a wedge collar adapted to snugly embrace said sleeve and being internally tapered to correspond with the taper of said sleeve, said collar having an exterior circumferential shoulder underlying the projecting shoulder flange of the other pipe section, said flange and the shoulder of said collar cooperating to provide a locking means-receiving passage extending in the circumferential direction, and said flange having a tangentially extending opening aligned with said passage and communicating with same, and a locking wire engageable in said passage through said flange hole for locking the rst mentioned pipe section against movement with respect to said collar and the other pipe section.

7. A pipe joint comprising pipe sections having meeting ends in substantially contiguous engagement with each other, circumferential outwardly extending shoulders at the meeting ends of said sections and made fast thereto, a split sleeve embracing atleast one of said pipe sections, a clamp collar operatively engaging said sleeve to cause same to firmly grip its underlying pipe section, and one of said shoulders being carried by said sleeve, one of said shoulders having a circumferential flange overlying the other shoulder, said flange and last mentioned shoulder cooperating to provide a circumferentially extending locking element-receiving passage, and said flange having a tangential hole aligned with said passage and communicating with the same, and a locking wire insertable into said passage through said hole.

JOHN LAWRENCE SAYERS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,476,119 Van Nagell Dec. 4, 1923 1,843,202 Buchanan Feb. 2, 1932 2,253,018 Cowles Aug. 19, 1941 2,310,490 Melsom Feb. 9, 1945 2,310,536 Melsom Feb. 9, 1945 2,376,017 Smallpeice May 15, 1945 

